How get my old status after refresh

[Mario]

Hello,
I use a TreeView with Checkboxes. I refresh my TreeView every 30 seconds with a timer. This works very well. Unfortunately, when i have selected any Items after the refresh my Selecting is lost. Is it possible, that i get my old Selection after the Refresh?

I use a ObjectDataSource (ODSLoadPlayerFromScheduler) for my TreeView.

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        LoadDB();
    }
    else if (IsPostBack)
    {
        LoadDBAfterPostback();
    }
}



private void LoadDB()
{
    int projectGroupID = pgID;

    if (!parameter.ToLower().Contains("administrators"))
    {
        ODSLoadPlayerFromScheduler.SelectParameters.Add("GroupName", parameter);
        ODSLoadPlayerFromScheduler.SelectParameters.Add("projectGroupID", projectGroupID.ToString());
    }
    else
    {
        ODSLoadPlayerFromScheduler.SelectParameters.Add("projectGroupID", projectGroupID.ToString());
    }
}

private void LoadDBAfterPostback()
{
    int projectGroupID = pgID;

    if (!parameter.ToLower().Contains("administrators"))
    {
        ODSLoadPlayerFromScheduler.SelectParameters["GroupName"].DefaultValue = parameter;
        ODSLoadPlayerFromScheduler.SelectParameters["projectGroupID"].DefaultValue = projectGroupID.ToString();
    }
    else
    {
        ODSLoadPlayerFromScheduler.SelectParameters["projectGroupID"].DefaultValue = projectGroupID.ToString();
    }
}

protected void Timer1_Tick(object sender, EventArgs e)
    {
        LoadDBAfterPostback();
    }

Can you help me with the solution to my problem?

BR
Reiner

[Nencho]

Hello Mario,

One approach you could use is to simply store each selected value in a HiddenField. Then after each refresh, you could get the stored values from the hidden field and bind them to your RadTreeView.

All the best,
Nencho
the Telerik team